Added an SsspBinaryTreeCloud configuration and client
Swapped in the use of CountDownLatch to replace the  ]various] barrier code in Master. Results in fewer Command classes, elimination of a couple of methods in ServiceImpl, and, most importantly a cleaner Master (especially the run method).
Eliminated the ComputeThread class in preference to the use of ExecutorService and Runnables. 
Boldly removed "synchronize" from yet another Worker method.
Miscellaneous edits, mostly to restore no-arg constructors to Command classes.
Trying to commit to origin/master branch the changes to CountDownLatch and elimination of ComputeThread.
Trying to commit to origin/master branch the changes to CountDownLatch and elimination of ComputeThread.
Merging maven branch

I will always pull first.
I will always pull first.